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The letters below fall away from the end of the alphabet at a steady rate. Complete the run.
W, S, O, K, ?

  • A.H
  • B.F
  • C.I
  • D.G

Answer: C

Correct answer: G

Each term is four places back from the one before: W(23), S(19), O(15), K(11). Four below 11 is position 7, which is G. Because the step is large and backwards, converting to positions is far safer than counting letters on the fingers. H at 8 is a three-step and F at 6 a five-step, the two neighbouring errors. Read in reverse the series is G, K, O, S, W, a four-step climb, which is the quickest way to confirm the answer once it has been found.

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